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Accounts of Chemical Research     Full-text available via subscription   (Followers: 82)
Acta Analytica     Hybrid Journal   (Followers: 7)
Advances in Analytical Chemistry     Open Access   (Followers: 25)
American Journal of Analytical Chemistry     Open Access   (Followers: 31)
Analytica Chimica Acta     Hybrid Journal   (Followers: 38)
Analytical and Bioanalytical Chemistry     Hybrid Journal   (Followers: 31)
Analytical Chemistry     Full-text available via subscription   (Followers: 214)
Analytical Chemistry Insights     Open Access   (Followers: 21)
Analytical Chemistry Research     Open Access   (Followers: 6)
Analytical Letters     Hybrid Journal   (Followers: 11)
Analytical Spectroscopy Library     Full-text available via subscription   (Followers: 9)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 9)
Biomonitoring     Open Access   (Followers: 2)
Chinese Journal of Analytical Chemistry     Full-text available via subscription   (Followers: 3)
Combinatorial Chemistry - an Online Journal     Open Access   (Followers: 2)
Comprehensive Analytical Chemistry     Full-text available via subscription   (Followers: 5)
Critical Reviews in Analytical Chemistry     Hybrid Journal   (Followers: 25)
Current Analytical Chemistry     Hybrid Journal   (Followers: 7)
Drug Testing and Analysis     Hybrid Journal   (Followers: 6)
Electroanalysis     Hybrid Journal   (Followers: 5)
Field Analytical Chemistry and Technology     Hybrid Journal   (Followers: 4)
Handbook of Analytical Separations     Full-text available via subscription   (Followers: 1)
Handbook of Thermal Analysis and Calorimetry     Full-text available via subscription  
International Journal of Analytical Chemistry     Open Access   (Followers: 21)
International Journal of Chemical and Analytical Science     Full-text available via subscription   (Followers: 3)
International Journal of Environmental Analytical Chemistry     Hybrid Journal   (Followers: 6)
International Journal of Polymer Analysis and Characterization     Hybrid Journal   (Followers: 6)
Journal of Analytical & Bioanalytical Techniques     Open Access   (Followers: 6)
Journal of Analytical Atomic Spectrometry     Full-text available via subscription   (Followers: 10)
Journal of Analytical Chemistry     Hybrid Journal   (Followers: 19)
Journal of Electroanalytical Chemistry     Hybrid Journal   (Followers: 4)
Journal of Essential Oil Research     Hybrid Journal   (Followers: 1)
Journal of Radioanalytical and Nuclear Chemistry     Hybrid Journal   (Followers: 5)
Journal of Thermal Analysis and Calorimetry     Hybrid Journal   (Followers: 22)
Main Group Metal Chemistry     Hybrid Journal   (Followers: 1)
Microchemical Journal     Hybrid Journal   (Followers: 3)
Nigerian Journal of Chemical Research     Full-text available via subscription  
Phytochemical Analysis     Hybrid Journal   (Followers: 2)
Polish Journal of Chemical Technology     Open Access   (Followers: 1)
Reviews in Analytical Chemistry     Hybrid Journal   (Followers: 9)
Sample Preparation     Open Access  
Surface and Interface Analysis     Hybrid Journal   (Followers: 13)
Techniques and Instrumentation in Analytical Chemistry     Full-text available via subscription   (Followers: 5)
TrAC Trends in Analytical Chemistry     Full-text available via subscription   (Followers: 53)
Trends in Environmental Analytical Chemistry     Hybrid Journal   (Followers: 2)
Vibrational Spectroscopy     Hybrid Journal   (Followers: 11)
World Journal of Analytical Chemistry     Open Access   (Followers: 1)
Journal Cover Journal of Analytical Chemistry
  [SJR: 0.33]   [H-I: 19]   [19 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1608-3199 - ISSN (Online) 1061-9348
   Published by Springer-Verlag Homepage  [2334 journals]
  • Green analytical chemistry: Opportunities for pharmaceutical quality
    • Authors: A. B. Eldin; O. A. Ismaiel; W. E. Hassan; A. A. Shalaby
      Pages: 861 - 871
      Abstract: Abstract This review article summarizes the opportunities for utilizing the green analytical chemistry (GAC) techniques and principles in the field of quality control (QC) of pharmaceuticals. Green analytical chemistry is considered a branch of the green chemistry based on the principles overlapping with the goals of sustainable development. General definitions of quality and quality control, the principles of GAC, proposals for greener sample pretreatment and greener chromatographic method of analysis applied in QC laboratories are discussed herein. The main goal is to achieve more eco-friendly analysis in QC laboratories through different strategies and techniques, replace toxic reagents, and modify or replace analytical methods and/or techniques with safer ones, making it possible to dramatically reduce the amounts of reagents consumed and waste generated.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090094
      Issue No: Vol. 71, No. 9 (2016)
  • Estimation of limits of detection and determination in X-ray fluorescence
           analysis by the dependence of the relative standard deviation on analyte
    • Authors: V. Ya. Borkhodoev
      Pages: 872 - 877
      Abstract: Abstract An experimental dependence of the relative standard deviation on analyte concentration of hyperbolic type, characterizing the precision of quantitative chemical analysis, was used to estimate the limits of detection and determination in the X-ray fluorescence analysis. A method is proposed for the determination of their values using the approximation of the experimental dependence of the relative standard deviation on the analyte concentration by a power function. The choice of the values of the relative standard deviation, being criteria for the estimation of these limits, is substantiated. A concept of the limits of detection and determination of an analytical procedure is formulated, according to which the limit of detection of an analytical procedure is an objective value depending only on the precision of determinations, and the limit of determination of an analytical procedure is a subjective value depending not only on the precision of determinations but also on the requirements to their limiting (admissible) accuracy. The limits of detection and determinations of an analytical procedure found by this approach completely characterize the possibilities of an analytical procedure in determining low concentrations of analytes. The proposed approach can be used for the estimation of the limits of detection and determination of analytical procedures and in other methods of chemical analysis with the hyperbolic dependence of the relative standard deviation on the analyte concentration.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816070054
      Issue No: Vol. 71, No. 9 (2016)
  • A mass-spectrometric study of the aqueous solutions of opiates with their
           ionization in a collison nebulizer
    • Authors: V. V. Pervukhin; D. G. Sheven’
      Pages: 878 - 887
      Abstract: Abstract It was found that the use of a Collison nebulizer as an ionization source for the mass-spectrometric analysis of the aqueous solutions of opium alkaloids makes it possible to determine opiates with the limits of detection of 8.8 × 10–9, 8.83 × 10–8, 1.6 × 10–7, and 3.5 × 10–8 M for papaverine, codeine, heroin, and morphine, respectively. The dependence of mass-spectrometric responses [(M + H)+ ions] on the concentrations of these compounds in water in a range from 10–8 to 10–3 M appears as a curve with a maximum; this is explained by the consideration of the most probable mechanisms of the ionization of drops on liquid spraying in a Collison nebulizer (a model of the destruction of a double electrical layer and a model of statistical fluctuations, which is also known as a model of symmetrical charging). The transformation of the mass spectrum of a mixture (1: 1: 1: 1) of morphine, codeine, papaverine, and heroin was studied on varying the concentration of this mixture in aqueous solution. Two samples of opium of Central-Asian origin were analyzed to test the applicability of ionization in a Collison nebulizer to the analysis of real test materials.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090112
      Issue No: Vol. 71, No. 9 (2016)
  • Cells for spectrophotometers with variable optical path lengths
    • Authors: A. Yu. Budantsev
      Pages: 888 - 890
      Abstract: Abstract A method and a device are proposed for varying optical path lengths of cells for spectrophotometers by placing parallel-plane insert plates (PPIPs) of variable thickness inside the cell. This method allows (a) the rapid adjustment of the optical path length of a standard cell (a dual PPIP set 5, 2 (2 pieces), and 1 mm thick ensures the variation of the optical path length of a 10-mm cell from 1 to 10 mm with a step of 1 mm); (b) mixing of solutions in cells; and (c) simple and quick washing of cells and PPIPs in routine spectral measurements.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090057
      Issue No: Vol. 71, No. 9 (2016)
  • Surface-enhanced Raman scattering sensing of trace fenthion coupled with
           stable silver colloids and OH stretching band of water as an internal
    • Authors: Y. J. Teng; W. H. Liu; J. M. Liu; Y. H. Nie; P. Li; C. J. He
      Pages: 891 - 895
      Abstract: Abstract The detection of trace fenthion using surface-enhanced Raman scattering (SERS) was proposed via the OH stretching band of water serving as an internal standard. The adsorption process of fenthion on the silver nanoparticle aggregates was characterized by UV-Visible absorption spectrometry and the optimal adsorption time was about 20 min. The OH stretching band of H2O molecule presented around 3100–3500 cm–1 in SERS spectrum was identified by density functional theory and it was not interfered with other characteristic peaks of fenthion. The linearity was obtained from the concentrations divided by the ratio of the benzene ring stretching area around 1073 cm–1 and the internal standard of OH stretching area from 3100 to 3500 cm–1, while the detection limit was calculated as 0.46 µM. The proposed SERS detection method was used in analyzing lake water sample with the recovery of 94–99%.
      PubDate: 2016-09-01
      DOI: 10.1134/s106193481609015x
      Issue No: Vol. 71, No. 9 (2016)
  • Reactions of palladium(II) and rhodium(III) with pyridylazo-2-naphthol and
           dithizone on PANV–KU-2 and PANV–AV-17 fibrous materials
    • Authors: V. P. Dedkova; O. P. Shvoeva; Ya. I. Simakina; A. A. Grechnikov
      Pages: 896 - 900
      Abstract: Abstract Reactions of palladium(II) and rhodium(III) with dithizone (DT) on polyacrylonitrile fiber filled with an AV-17 anion exchanger (PANV–AV-17) and 1-(2-pyridylazo)-2-naphthol (PAN) immobilized on polyacrylonitrile fiber filled with a KU-2 cation exchanger (PANV–KU-2–PAN) are studied by diffuse reflection spectroscopy. Conditions of rhodium complexation on PANV–KU-2–PAN (ascorbic acid concentration, pH of solution in adsorption, and the duration of heating samples) and palladium complexation with DT after adsorption from a 0.1 M NaCl solution (pH 2) on PANV–AV-17 in the dynamic mode are found. The limits of detection for rhodium and palladium are 10 and 5 ng/mL, respectively. At 640 nm, the calibration graphs are linear in the ranges of palladium and rhodium concentrations 0.008–0.06 µg/mL and 0.02–0.2 µg/mL, respectively. The mutual influence of rhodium and palladium is studied. It is shown that the determination of palladium with DT on a PANV–AV-17 solid phase is not affected by the presence of a 5-fold amount of rhodium, and rhodium can be determined on PANV–KU-2–PAN at 590 nm in the presence of 2-fold amounts of palladium.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090070
      Issue No: Vol. 71, No. 9 (2016)
  • A simple multisensor detector based on tin dioxide in capillary gas
    • Authors: V. G. Povarov; A. I. Lopatnikov
      Pages: 901 - 906
      Abstract: Abstract The use of an array of metal oxide film sensors as a detector for volatile organic compounds in capillary gas chromatography is described. The results of determination of the sensitivity, response time, and linearity range of the analytical signals from sensors are presented; these parameters are compared with similar characteristics of commercial gas chromatographic detectors. An approach is proposed to the identification of organic compounds by the shape and relative size of responses of individual sensors. It is demonstrated that the multisensor detector is applicable to solving typical analytical problems of the quantitative analysis of multicomponent mixtures.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090136
      Issue No: Vol. 71, No. 9 (2016)
  • Planar microchromatographic columns for gas chromatography
    • Authors: I. A. Platonov; V. I. Platonov; Yu. I. Arutyunov
      Pages: 907 - 911
      Abstract: Abstract The adsorption and selective properties of aluminum-based planar microcolumns filled with the Carbopack B adsorbent are studied. The effect of geometrical parameters of the columns on their chromatographic properties is considered on an example of the separation of a mixture of light hydrocarbons. The advantages of planar microcolumns compared to conventional packed chromatographic columns are revealed.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090124
      Issue No: Vol. 71, No. 9 (2016)
  • Determination of alkylamines in aqueous media by capillary electrophoresis
    • Authors: M. Ya. Kamentsev; L. N. Moskvin; Yu. Malinina; N. M. Yakimova; I. D. Kuchumova
      Pages: 912 - 916
      Abstract: Abstract A procedure is developed for the determination of organic amines in potable water and wastewater by capillary electrophoresis. A mixed solution of benzimidazole and tartaric acid is selected as a leading electrolyte for indirect photometric detection. The sample was injected hydrodynamically. The procedure was tested on samples of potable water and wastewater. The accuracy of the results was evaluated by the standard addition method. The analytical range is 0.25–5 mg/L. The analysis time is 4–5 min.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090100
      Issue No: Vol. 71, No. 9 (2016)
  • Electrochemical reduction of selenium on a silver electrode and its
           determination in river water
    • Authors: Lai-Hao Wang; Xi-En Shan
      Pages: 917 - 925
      Abstract: Abstract A new, simple, and fast method is described for determining selenium based on a silver wire electrode flow-through voltammetric detector. A comparison was done between the sensitivity of disk silver, mercury-modified glassy carbon, and mercury-modified gold electrodes. The response of the flow-through voltammetric detector was evaluated with respect to each electrode’s operating potential and pH in direct current mode. The limit of detection (3s) for Se(IV) was below 0.01 mg/L. The flow-through system does not need deposition times and the organic matter does not need to be removed before determining selenium in river water.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090161
      Issue No: Vol. 71, No. 9 (2016)
  • Voltammetric determination of bisoprolol on a glassy carbon electrode
           modified by poly(arylene phthalide)
    • Authors: R. A. Zil’berg; Yu. A. Yarkaeva; A. V. Sidel’nikov; V. N. Maistrenko; V. A. Kraikin; N. G. Gileva
      Pages: 926 - 931
      Abstract: Abstract New voltammetric sensors based on glassy carbon electrodes (GCEs) modified by poly(arylene phthalide) are studied. The electrochemical behavior of bisoprolol on GCEs modified by poly(arylene phthalide) is investigated. The effects of potential scan rate, time of accumulation on the electrode, pH of supporting electrolyte, and concentration on the current of bisoprolol electrooxidation are estimated. A procedure is developed for the voltammetric determination of bisoprolol on glassy carbon electrodes modified by poly(arylene phthalide). The dependence of the analytical signal on the concentration of bisoprolol is linear in the range 10–6–10–5 M with the limit of detection (3.4–9.8) × 10–8 M.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090173
      Issue No: Vol. 71, No. 9 (2016)
  • Determination of hydrogen peroxide and organic peroxides in micellar and
           aqueous–organic media using a spectrophotometric biosensor based on
           horseradish peroxidase
    • Authors: P. V. Rodionov; E. A. Alieva; E. A. Sergeeva; I. A. Veselova; T. N. Shekhovtsova
      Pages: 932 - 943
      Abstract: Abstract The expedience of the target-specific control of the properties of a medium (using micellar and aqueous–organic media), in which an indicator process providing the background for the operation of a spectrophotometric sensor based on a polyelectrolyte complex (horseradish peroxidase–chitosan) is conducted, is shown experimentally and proved by calculations of kinetic parameters of the enzymatic reaction. The application of the sensor ensures an increase in the sensitivity of the determination of peroxides of different nature and structures (e.g., hydrogen and urea peroxides, benzoyl peroxide, 2-butanone peroxide and tertbutyl hydroperoxide) in complex matrixes. The proposed approach allows the analyst not only to regulate the performance characteristics of the developed procedures for the determination of peroxides depending on the analytical task, but also to extend the range of test samples (including those insoluble in water) analyzed with no sample preparation.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090148
      Issue No: Vol. 71, No. 9 (2016)
  • Enzyme immunoassay for detection of Sudan I dye and its application to the
           control of foodstuffs
    • Authors: E. A. Zvereva; B. Ts. Zaichik; S. A. Eremin; A. V. Zherdev; B. B. Dzantiev
      Pages: 944 - 948
      Abstract: Abstract Food safety measures should include the control of the illegal use of banned toxic dyes, including Sudan I as one of the most commonly used coloring agents. A procedure was developed for the enzyme immunoassay of Sudan I carried out in the kinetic mode in order to enhance the performance and rapidity of assays. The achieved limit of detection of Sudan I is 0.13 ng/mL, and the detectable concentration range is from 0.24 to 2.32 ng/mL. The assay time is 50 min. The results obtained by enzyme immunoassay and HPLC for food extracts (tomato paste, chili sauce, spices) showed good correlation. Due to high performance, the new procedure holds promise for the screening control of Sudan I in foodstuffs.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090185
      Issue No: Vol. 71, No. 9 (2016)
  • Determination of 2,4-dichlorophenoxyacetic acid in cereals by fluorescence
           polarization immunoassay
    • Authors: A. Yu. Boroduleva; S. A. Eremin
      Pages: 949 - 954
      Abstract: Abstract A fluorescence polarization immunoassay (FPIA) procedure is developed for the determination of 2,4-dichlorophenoxyacetic acid in cereal grains using a Sentry-200 portable device. We synthesized tracers, that is, antigens labeled with fluorescein derivatives, based on two fluorescent compounds and two chlorophenoxyacids. The tracer synthesized from 2,4-dichlorophenoxyacetic acid and 4-aminomethylfluorescein is found to be optimal for the FPIA of 2,4-dichlorophenoxyacetic acid. The limit of detection for 2,4-dichlorophenoxyacetic acid in flour was 40 ng/g; the analytical range is from 80 to 1000 ng/g. The percentage of recovery was 85 ± 7% at the relative standard deviation (RSD) 2–10%.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090045
      Issue No: Vol. 71, No. 9 (2016)
  • Determination of some cathinones, tropane alkaloids, and
           “pharmaceutical narcotics” in urine
    • Authors: A. A. Azaryan; A. Z. Temerdashev; E. V. Svetlichnaya; A. G. Kal’nitskii; I. A. Balabaev
      Pages: 955 - 964
      Abstract: Abstract A procedure is proposed for determining some narcotic and psychoactive substances (cathinones, tropane alkaloids, derivatives of ?-aminobutyric acid) in urine, including sample preparation and the determination of analytes by HPLC coupled with electrospray ionization tandem mass spectrometry. Sample preparation involved acid hydrolysis or the dilution of the sample. The lower limit of quantification is 200 pg/mL; the limit of detection is 100 pg/mL; and the calibration curves are linear in the range 0.2–50 ng/mL. The procedure was tested on real samples provided by the Toxicological Department of the Krasnodar Regional Narcological Dispensary. The high sensitivity of the analytical system ensures its use for the determination of narcotic preparations within a certain time after their intake, which may be of particular importance for forensic examinations.
      PubDate: 2016-09-01
      DOI: 10.1134/s1061934816090021
      Issue No: Vol. 71, No. 9 (2016)
  • Application of MATLAB package for the automation of the chemometric
           processing of spectrometric signals in the analysis of complex mixtures
    • Authors: Y. B. Monakhova; S. P. Mushtakova
      Pages: 759 - 767
      Abstract: Abstract We describe three types of automatic software for the chemometric processing of spectrometric data. The software was developed in the MATLAB working environment and includes data import, mathematical preprocessing, chemometric analysis, and generation of a report file. The software is designed to solve problems regarding identification of some components of multicomponent mixtures, determination of compounds with overlapping signals, and differentiation of samples by their spectral responses. To test the software, we present examples of spectrometric analyses of coffee, fruit juices, and alcoholic beverages using chemometric methods of independent component analysis (ICA) and partial least squares–discriminant analysis (PLS–DA). In particular, we simulated electronic absorption spectra for the identification of three artificial colors (E110, E102, and E122) in alcoholic beverages, NMR spectra for the simultaneous determination of five components (acetic acid, γ-aminobutyric acid, arginine, acetaldehyde, and proline) in orange juice without using reference standards, and NMR spectra of coffee samples to determine its varietal authenticity (Arabica or Robusta). The duration of automatic chemometric processing did not exceed 1 min per sample. The developed software can be optimized for other matrices and/or brands of spectrometers.
      PubDate: 2016-08-01
      DOI: 10.1134/s1061934816060125
      Issue No: Vol. 71, No. 8 (2016)
  • Determination of o -phthalic acid esters in water by
           chromatography–mass spectrometry with emulsion dispersive
           liquid–liquid microextraction preconcentration
    • Authors: V. A. Krylov; V. V. Nesterova
      Pages: 777 - 785
      Abstract: Abstract Using emulsion dispersive liquid–liquid microextraction preconcentration and injection of a large volume of an extract (10 μL), the limits of chromatographic–mass spectrometric detection of o-phthalic acid esters in water have been attained at the level 4 × 10–6–1 × 10–5 mg/L. The main source of the systemic error of the determination of impurities was found to be the release of o-phthalates from microparticles of chromatographic septum to the carrier gas. The extractant (n-octane) was purified by Rayleigh distillation. The independence of the concentration coefficient of the studied o-phthalates of concentration in the range (0.4–30) × 10–4 mg/L has been demonstrated. The relative expanded uncertainty of the determination of o-phthalates has been calculated and equals 12–39%.
      PubDate: 2016-08-01
      DOI: 10.1134/s1061934816080098
      Issue No: Vol. 71, No. 8 (2016)
  • Simple approach for evaluation of matrix effect in the mass spectrometry
           of synthetic cannabinoids
    • Authors: P. Adamowicz; W. Wrzesień
      Pages: 794 - 802
      Abstract: Abstract A simple approach for studying and identifying matrix effect is described. This method for the determination of matrix effect combines the advantages of two most popular traditional methods while eliminating their disadvantages. A postcolumn infusion system was used to observe the MS signal alterations of synthetic cannabinoids: UR-144, XLR-11 and STS-135. Protein precipitation, liquid–liquid extraction and solid phase extraction sample preparation methods were tested. The results of the experiments showed that the discussed method of matrix effect estimation can have practical application in the development of analytical methods. The comparison of the normalized matrix effect profiles can be done even for data obtained over time. Obtained results also indicated that matrix effect was highly dependent on sample preparation. Although similar structure, significant differences were observed for different synthetic cannabinoids.
      PubDate: 2016-08-01
      DOI: 10.1134/s1061934816080025
      Issue No: Vol. 71, No. 8 (2016)
  • Ion chromatography with the selective adsorption of anions during the
    • Authors: A. M. Dolgonosov; N. K. Kolotilina
      Pages: 803 - 807
      Abstract: Abstract A method of the selective removal of certain anions from the eluate in an ion chromatographic experiment (the adsorption column method) is proposed for the qualitative and quantitative determination of the removed anions and/or coeluted unadsorbed sample components. The method is suitable for some complex cases of anion analysis (F–/IO 3 - Cl–/NO 2 - ) using a METROHM ion chromatograph.
      PubDate: 2016-08-01
      DOI: 10.1134/s1061934816080050
      Issue No: Vol. 71, No. 8 (2016)
  • Voltammetric sensors based on gel composites containing carbon nanotubes
           and an ionic liquid
    • Authors: L. K. Shpigun; N. A. Isaeva; E. Yu. Andryukhina; P. M. Kamilova
      Pages: 814 - 822
      Abstract: Abstract Possibilities of using electrode coatings based on a gel of carboxylated multiwall carbon nanotubes (MWCNTs) in an ionic liquid (1-butyl-3-methylimidazolium hexafluorophosphate, [BMIm]PF 6 ) for the creation of a voltammetric sensor with electrocatalytic properties with respect to the pharmacological group of catecholamines—levodopa, methyldopa, and carbidopa—are considered. Using cyclic voltammetry, it was found that a glassy carbon electrode coated with a thin layer of an MWCNT–[BMIm]PF6 gel or an MWCNT–[BMIm]PF6–Nafion gel-composite induced a decrease in overvoltage (~60 mV), improved the reversibility of the redox reaction, and increased oxidation currents of the studied substances in comparison with an unmodified glassy carbon electrode. The concentration dependence of the analytical signal was linear in the ranges of 1–250, 2–350, and 5–400 mM for carbidopa, levodopa, and methyldopa, respectively. In the determination of the specified substances in diluted urine samples and tableted drugs, the accuracy index was 98–102% and the relative standard deviation, 0.3–5% (n = 5, P = 0.95).
      PubDate: 2016-08-01
      DOI: 10.1134/s1061934816080141
      Issue No: Vol. 71, No. 8 (2016)
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